Control mechanism.



F. E. BAKER. CONTROL MECHANISM. APPLICATION FILED 001218, 1913.

Patented Feb. 2, 1915.

I N VE NTOR WITNESSES RT T0 RN EY pnrrn sA'I p s-rA"rEN FFICE.

FRANK E. BAKER, OF ROYAL OAK, MICHIGAN, ASSIGNOR 'IO DETROIT TRACTOR COMPANY, OF LA FAYETTE, INDIANA, A CORPORATION OF INDIANA.

CONTROL MECHANISM.

Specification of Letters Patent.

.llatented Feb. 2, 1915 Application filed October 18, 1913. Serial N 0. 795,848.

nisms, and declare the following to be a full, I

clear, and exact description of the same, such. as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to control devices and has forits object a mechanism adapted to effect several dilferent operations by ones actuating two draft devices. This will more fully appear in the following.

in the drawingsz-Figure l, is a plan view of this control mechanism, the dotted lines of this figure showing the: position of the parts when simultaneous pull is exerted on both the draft members to throw out the clutch. Fig. 2, is a similar view of the parts showing their position when draft is exerted on the draft member at the left of the figure. Fig. 3, is a detail showing a slight modification of the control mechanism.

This control mechanism is intended especially for use with tractors. It is intended to steer by pulling either of the two reins independently and to throw off the power or do other work by pulling them conjointly.

A conjoint pull on the reins a: and y pulls the levers t, u, which are connected with a swinging crossbar w by means ofthe draw bars The swinging cross bar w is pivoted upon a connecting bar 1 which connects with the end of the bell-crank lever which controls the clutch. It will be observed that the pivoting of the swinging bar in might be on the end of the bell-crank lever 9 except that, for convenience of arrangement, it is advisable to employ the connecting bar 1.

A post 2 is turned either clockwise or counter clockwise by an independent pull on either lever t or it. This pull must be great enough to allow the pin 3 to strike the bottom of the sl t 4 in either of the connecting links 5 wlin the crank arm 6 of the posty2 with the swinging bar 'w. This allows a certain amount of lost motion before independent pull on either rein a: or 3 turns the post 2. This lost motion allows a short conjoint pull such as shown in dotted lines of Fig. 1 upon both reins without turnmg the post 2. Such a conjoint pull draws the connecting bar 1 and throws out the clutch, as shown in dotted lines of Fig. 1.

Fig. 3 shows practicallythe same style of control, as shown in Figs. 1 and 2, but the links 5 are done away with and the crank arm 6 is bent to take the place of the links so that the ends of the crankarm are slightly spaced from the, swinging bar co when that member is in neutral position. Hence therev is a certain amount of lost mo: tion in the swinging bar 20 'before the crank arm 6 is actuated.

What I claim is; Y

1. The combination of a pivoted and transversely movable bar, draft members .attached to each end of the bar, a rotatable post adjacent said pivoted bar, and a crank arm extending on each side of the rotatable post and attached thereto, said crank arm havinga lost motion actuative relation with the pivoted bar, substantially as described.

2. The combination of a pivoted and transversely movable bar, a rotatable post, a crank arm extending on each side of the .post and fastened thereto, said crank arm being provided at each end with rigid portions that protrude toward and into prox imity, with respect to the pivoted bar, and a draft member connecting with .each end of the pivoted, barwhereby a. certain amount of conjoint pull may be exercised upon the twodraft members without engaging thecrank, while a greater amount of independout pull on either draft member causes the bar to encounter one of the crank portions and swing the rotatable post.

3..The combination of a pivoted and 1 transversely movable bar, a rotatable post,

a crank arm extending on each side, of the post and provided at .each end with-rigid projecting portions that project towardand into proximity with respect to the pivoted bar, two 'pivotally supported levers and a draw bar connecting each lever to'each end In testimony Whereef, I sign this specifi of the .Igivoted bar, whereby a certain cation in the presence of'two' witnesses. amount 0 cenjoint ull on the levers moves We the pivoted bar with gut actuating the crank, FRANK T but a greater amount of pull on either lever Witnesses:

swings the pivoted fiber and actuates the STUART G. BARNES9 crank, MARIETTA E. RUDD. 

